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  • MySql UDF using shared library won't load

    - by Jarrod
    I am attempting to create a mysql UDF which will match a fingerprint using Digital Persona's free linux SDK library. I have written a trivial UDF as a learning experience which worked fine. However, when I added a dependency to Digital Persona's shared object I can no longer get MySql to load my UDF. I added includes to DP's headers and compiled my UDF using: gcc -fPIC -Wall -I/usr/src/mysql-5.0.45-linux-i686-icc-glibc23/include -shared -o dp_udf.so dp_udf.cc I also tried adding the -static argument, but whenever I restart MySql, I get the error: Can't open shared library 'dp_udf.so' (errno: 0 /usr/local/mysql/lib/plugin/dp_udf.so: undefined symbol: MC_verifyFeaturesEx) MC_verifyFeaturesEx is a function defined "dpMatch.h" which I included, and is implemented in libdpfpapi.so which I have tried placing in the same location as my dp_udf.so and in /usr/lib. Am I doing something wrong with my call to gcc (my C++ skills are rusty) or does MySql not allow UDFs to use additional shared objects?

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  • Why use hashing to create pathnames for large collections of files?

    - by Stephen
    Hi, I noticed a number of cases where an application or database stored collections of files/blobs using a has to determine the path and filename. I believe the intended outcome is a situation where the path never gets too deep, or the folders ever get too full - too many files (or folders) in a folder making for slower access. EDIT: Examples are often Digital libraries or repositories, though the simplest example I can think of (that can be installed in about 30s) is the Zotero document/citation database. Why do this? EDIT: thanks Mat for the answer - does this technique of using a hash to create a file path have a name? Is it a pattern? I'd like to read more, but have failed to find anything in the ACM Digital Library

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  • Recording Audio through M-Audio Keystudio

    - by interstar
    Hi, I'm trying to get my M-Audio Keystudio (which has an audio input as well as the keyboard) to record audio to Audacity. I'm in Ubuntu 10.10. When I look at the Sound Preferences I can select "M-Audio RunTime DFU Analog Stereo" as my input device. However, when I try to record in Audacity, Audacity remains frozen. The program seems to be running and recording, but the recording cursor won't advance. If I reset the audio input to the internal sound card, recording works normally. Any ideas what to look for?

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  • Getting Started in Electronics Tinkering: A Shopping List

    - by Jason Fitzpatrick
    If you’re interested getting an electronics tinkering hobby off the ground this detailed list of things you’ll need (including why you’ll need them and how to get the best value) is an excellent starting place. Kenneth Finnegan started his adventures in electronics tinkering a little over two years ago and in that time advanced from being a complete beginner to putting together some really advanced projects. After his projects started appearing on popular hacking/electronics blogs like Hack A Day he decided to put together a guide to help out all the new hobbyists who were emailing him about his projects and what kind of gear they should get. His buying guide covers books, equipment, development tools, components, and analog chips. His list is very detailed with links galore and plenty of explanation for a new hobbyist. So You Want to Build Electronics [Kenneth Finnegan via Hack A Day] What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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  • Google Talk Plugin in GMail on MacBook 2,1

    - by jrc03c
    I'd like to use the chat section in GMail to make phone calls. I've downloaded and installed the Google Talk plugin, and it acts like it knows what it's doing. But when I try to make calls, the internal laptop mic doesn't work at all (i.e., no one on the other end can hear me). In the GMail chat settings, I've tried selecting "Default Device" for the microphone, as well as "Internal Audio Analog Stereo." No matter which setting I try, none seem to work. As I said at the top, this is only a problem in Ubuntu; it works just fine in OSX and Windows (which means that yes, my Google Voice account is properly configured). Here are my tech specs: Ubuntu 10.10 Kernel Linux 2.6.35-24-generic Gnome 2.32.0 Google Chrome 8.0.552.237 Google Talk Plugin (google-talkplugin) 1.8.0.0-1 MacBook (2,1) w/ internal microphone Any help will be greatly appreciated! Thanks!

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  • Internal microphone not working in Google talk

    - by Tim
    My laptop is Lenovo T400, which has an internal microphone. My OS is Ubuntu 10.10. My browser is Firefox 11.0. The internal microphone works fine, because I can use it to record my voice using Audaciy. However, in Google talk, I have choose "Internal Audio Analog Stereo" in "Settings - Voice and video chat - Microphone:". But when I click "Verify your settings", it doesn't work. Neither can I speak to others using Google Talk. I wonder why? Thanks and regards!

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  • Black screen in installation when Nvidia graphic card plugged

    - by jopasso1
    When I try to install any recent version of Ubuntu, the screen shows some green and purple mess (like analog TVs when thers no signal). Then, a black screen. I guess it keeps booting in live/install mode. But I can't see it. I tried installing from CD and USB, I tryed changing some BIOS settings... I installed older versions, like 8.04, and it worked, but after updating the system, it crashes again. That's why I discovered that upgrading Nvidia drivers, made system show a black screen again. After that, I unplugged the Nvidia card and installed 12.04 with onboard card. It worked perfectly. Then, I plugged Nvidia again and system booted, but only showing that black screen again. I keep working with onboard card, so far... The nVidia is a GeForce 8500GT.

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  • Sound muted in milliseconds after unmute

    - by Yash Gupta
    I installed Ubuntu 11.10 recently, and sound doesn't work properly. Whenever I try to play a sound (from any software), the sound is muted, and when I unmute it, it stats there for a fraction of second and mutes itself. After trying various things, I plugged in a headphone in the front microphone jack of my computer, and magecally, the sound started to come out from my speakers (Which are connected to the line-out in the rear panel). I have analog stereo speakers. The sound card (intel HDA as shown in alsamixer) is detected properly. I have ecs G41T-M7 motherboard and nVidia GT240 (with graphics drivers installed)

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  • DIY Internet Radio Maintains Controls and Interface of Vintage Case

    - by Jason Fitzpatrick
    Updating an old radio for modern inputs/streaming audio isn’t a new trick but this DIY mod stands out by maintaining the original controls and interface style. Rather than replace the needle-style selector window with a modern text-readout or cover-flow style interface, modder Florian Amrhein opted to replace the old rectangular station selector with an LCD screen that emulates the same red-needle layout. Using the same knob that previously moved the needle on the analog interface, you can slide the digital selector back and forth to select Internet radio stations. Watch the video above to see it in action and hit up the link below for the build guide. 1930s Internet Radio [via Hack A Day] HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder?

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  • Suitable Ubuntu distribution

    - by Dr AMD
    I need help choosing a suitable distrbution for my PC. I am using an HP d530 CMT with: ?• CPU Type: Intel Pentium 4, 3000 MHz (15 x 200) ?• Motherboard Chipset: Intel Springdale-G i865G ?• System Memory: 1015 MB (PC3200 DDR SDRAM) ?• Video Adapter: Intel(R) 82865G Graphics Controller (96 MB) ?• 3D Accelerator: Intel Extreme Graphics 2 ?• Audio Adapter: Analog Devices AD1981B(L) @ Intel 82801EB ICH5 - AC'97 Audio Controller ?• Network Adapter: Broadcom NetXtreme Gigabit Ethernet I have tried to install Ubuntu 13.10 and 12.04 LTS. Everything is OK on Ubuntu 12.04 except, that the video card was not recognized and the media player, YouTube,etc. did not work properly.

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  • Ask the Readers: How Do You Track Your Time?

    - by Jason Fitzpatrick
    Whether you’re tracking time for a client or keeping track of how you spend your day to bolster productivity, there’s a variety of tools and tricks you can use to get the big picture on where your time is spent. This week we want to hear all about your time tracking tools, tricks, and tips. How do you manage your time? What apps do you use to categorize and sort it? No matter how loosely or tightly you track your time or whether you use an analog or a digital system, we want to hear the ins and outs of it. Sound off in the comments below and then check back in for the What You Said roundup on Friday. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • How do I record audio through M-Audio Keystudio?

    - by interstar
    Hi, I'm trying to get my M-Audio Keystudio (which has an audio input as well as the keyboard) to record audio to Audacity. I'm in Ubuntu 10.10. When I look at the Sound Preferences I can select "M-Audio RunTime DFU Analog Stereo" as my input device. However, when I try to record in Audacity, Audacity remains frozen. The program seems to be running and recording, but the recording cursor won't advance. If I reset the audio input to the internal sound card, recording works normally. Any ideas what to look for?

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  • Why does F. Wagner consider "NOT (AI_LARGER_THAN_8.1)" to be ambiguous?

    - by oosterwal
    In his article on Virtual Environments (a part of his VFSM specification method) Ferdinand Wagner describes some new ways of thinking about Boolean Algebra as a software design tool. On page 4 of this PDF article, when describing operators in his system he says this: Control statements need Boolean values. Hence, the names must be used to produce Boolean results. To achieve this we want to combine them together using Boolean operators. There is nothing wrong with usage of AND and OR operators with their Boolean meaning. For instance, we may write: DI_ON OR AI_LARGER_THAN_8.1 AND TIMER_OVER to express the control situation: digital input is on or analog input is larger than 8.1 and timer is over. We cannot use the NOT operator, because the result of the Boolean negation makes sense only for true Boolean values. The result of, for instance, NOT (AI_LARGER_THAN_8.1) would be ambiguous. If "AI_LARGER_THAN_8.1" is acceptable, why would he consider "NOT (AI_LARGER_THAN_8.1)" to be ambiguous?

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  • USB Audio Device Loopback Through Speakers

    - by matto1990
    I have a USB turntable which when plugged in to my ubuntu 10.10 machine appears in the audio settings as an input device (USB PnP Audio Device Analog Stereo) like a microphone. What I'd like to be able to do it to have the sound for that audio device played back through the audio output (speaker or whatever). I'm not too worried if there's a slight delay between the audio coming in and it being played out through the speakers. As far as I'm aware this is refereed to as software loopback. I can achieve exactly what I want if I open Audacity, enable software loopback and press record. Obvious this isn't ideal as I don't really want it recording what I'm playing all the time. I know this is possible because of the Audacity example however I'd like to know if there's a way to do it without it recording. I've search around for a while for a piece of software that does this, however I couldn't get anything even close. Any help would be greatly appreciated.

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  • Headset undetected when plugged in

    - by tough
    I have recently installed Ubuntu 12.04 in my machine which was running windows 7. I have been trying to configure the audio to work exactly as it used to work in Windows but never been able to do so. I have followed this link exactly. I am still not getting the required configuration. aslamixer command shows me with 5 adjustable controls as shown below Master "adjustable" Speaker "adjustable" PCM "adjustable" Front "adjustable" AND Beep "adjustable" Mic Jack Mic In or Lin In S/PDIF OO "in a box" S/PDIF D OO "in a box" S/PDIF P DIGITAL or Analog M It does not detect the headset jack when plugged in. I here mean to say that the sound form the speakers does not go off when I plug in my headset jack. How can I make this working. Some other googling also did not help. I am on Hp Pavilion DV7 machine. The chip is IDT 92HD75B3X5 and the card is HDA ATI SB.

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  • How To Properly Scan a Photograph (And Get An Even Better Image)

    - by Eric Z Goodnight
    Somewhere in your home, there’s a box of old analog photographs you probably want digital copies of. Unless you know how to use your scanner correctly, the image quality can turn out poor. Here’s how to get the best results. If your memories are important to you, then it’s worth taking the time to do them right. Today we’re going to look at the largely overlooked tools and methods that’ll give you the best possible quality out of a scan of a less than perfect photo. We’ll see how to make the most of the scanning software and how to use graphics programs to make the image look better than the original photograph. Keep reading! How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage

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  • choppy sound with random popping 13.04

    - by Goddard
    I was hoping some one could help me figure out why my audio is popping randomly. I just got some new speakers and it was popping previously, but I was using monitor speakers so it wasn't really noticeable. Now I have some Bose speakers hooked up via an analog cable. It is not the speakers because my Android phone plays audio fine. When I open the sound settings window the popping happens at exactly the same time a third sound device is displayed very quickly and then disappears. This keeps happening at about 30 second intervals. Any help is appreciate. If you need more details just let me know how to get them.

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  • Problem with sound in Kubuntu 12.10

    - by Mihkel
    I'm really enjoying Kubuntu 12.10 experience, but the problem starts with sound. It wasn't here before, but today sound sounds garbled and echoed and wrong. It happens in Audacity and VLC. It doesn't happen when I test the sound devices nor when I use Amarok to play the music files (but come on, who uses Amarok to listen to a random music file, it's much more natural to use VLC for that ;-) ) Kubuntu/Phonon recognizes 2 sound devices: 1) RV770 HDMI Audio [Radeon HD 4850/4870] Digital Stereo [HDMI] 2) Built-in Audio Analog Stereo I know it has to use the second option, and it probably does, but that's not the case. What I did find out was that I had to rescan for audio devices in Audacity (and probably select "sysdefault") for it to sound normal. Why does it happen? I've tried following some other questions, but well.

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  • No sound on fresh install of 13.10

    - by Totalnon
    I installed a new copy of 13.10 today and cannot get my audio to work. Speakers test good on other devices, enabled in the BIOS, worked this morning in a Windows environment. I ran all of the available updates through apt-get. aplay -l lists my card (which tells me Ubuntu recognizes the hardware, I have been looking around the web and trying various things to no avail. Pulse folder permissions seem fine, I've reinstalled ALSA, and the card shows both digital and analog in the system settings sound section. I have tried this guide: Sound Troubleshooting Guide As well as looked through these forums under the tags sound and 13.10 Anyone have any ideas that may help me?

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  • Simpler Times

    - by Simon Moon
    Does anyone else out there long for the simpler days where you needed to move a jumper in the jumper block to set your modem card to use IRQ7 so it would not conflict with the interrupts used by other boards in your PC and your modem card came with a 78 page manual telling you everything you would need to know to write your own driver for the board including a full schematic along with the board layout showing every chip, capacitor, and resistor?  Ahhhhh, the simplicity!I am wrestling with UserPnp issues for a USB software licensing dongle that is needed by some third party software in one of our production applications. Of course, every machine in production is virtual, so it could be anything in the chain of the software application library to the device driver running on the VM to the configuration of the simulated USB port to the implementation of the USB connection and transport in the virtual host to the physical electrical connections in the USB port on the hypervisor.If only there were the virtual analog to a set of needle-nose pliers to move a virtual jumper.Come to think of it, I always used to drop those damn things such that they would land in an irretrievable position under the motherboard anyway.

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  • What scripts get run on session start and end?

    - by maaartinus
    I want to mount and unmount an encrypted partition just like ecryptfs works with the home partition. Where can I put my commands so that they get executed upon session start and session end (the important part is the unmounting when I log out). UPDATE: For the session start I'm using .gnomerc and it does what I want. For the session end I've found no solution. I had a look at the sources of ecryptfs and it looks quite complicated. It's a pity that nobody thought about creating something analog to .bash_logout.

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  • Bluetooth device paired and connected (no sound)

    - by Michael
    I've got a Bluetooth headset which works great in both Windows 8 and Android 4.2 however on Ubuntu (13.10) it just doesn't seem to work. I installed Blueman, it paired and connected successfully when I tried Audio sink but it still doesn't show up in my Sound Settings nor PulseAudio which I installed and tried. All there is in my Sound Settings is "Analog Output". I tried several fix like changing and adding things in /etc/bluetooth/audio.conf without any success. I've restarted the bluetooth service several times in the process as well. Let me know if you need more information from me and my system. Kind regards, Michael.

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  • 12.04 sound keeps auto-muting when idle

    - by fali
    I just installed 12.04 on an HP8510W. Everything works fine except for one weird behavior which I have noticed. When ever there is no audio playing, the audio mute indicator on the laptop is on. As soon as I start playing a you tube video the mute indicator turns off and I get sound. Here is my pulse audio output which says that the sink is suspended because it is idle: Welcome to PulseAudio! Use "help" for usage information. list-sinks 1 sink(s) available. index: 0 name: <alsa_output.pci-0000_00_1b.0.analog-stereo> driver: <module-alsa-card.c> flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: SUSPENDED suspend cause: IDLE I tried running alsamixer, but I don't see the auto-mute option.

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